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In two moles of acetaldehyde (CH3CHO) calculate the following :a. Number of moles of carbon b. Number of moles of hydrogen c. Number of moles of oxygen d. Number of molecules of acetaldehyde |
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Answer» Molecular formula of acetaldehyde : C2H4O Moles of acetaldehyde = 2 mol a. Number of moles of carbon atoms = Moles of acetaldehyde × Number of carbon atoms = 2 × 2 = 4 moles of carbon atoms b. Number of moles of hydrogen atoms = Moles of acetaldehyde × Number of hydrogen atoms = 2 × 4 = 8 moles of hydrogen atoms c. Number of moles of oxygen atoms = Moles of acetaldehyde × Number of oxygen atoms = 2 × 1 = 2 moles of oxygen atoms d. Number of molecules of acetaldehyde = Moles of acetaldehyde × Avogadro number = 2 mol × 6.022 × 1023 molecules/mol = 12.044 × 1023 molecules of acetaldehyde ∴ i. Number of moles of carbon, hydrogen and oxygen are 4, 8, 2 respectively. ii. Number of molecules of acetaldehyde = 12.044 × 1023 |
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